Monopteryx jahnii Pittier (1915) Fissicalyx fendleri is a species of flowering plant in the legume family, Fabaceae.

It is a tree native to the tropical Americas, ranging from Panama through Colombia, Venezuela, and Guyana to northern Brazil.

It grows in humid lowland forest.

[1] It belongs to subfamily Faboideae, and was recently assigned to the informal monophyletic Pterocarpus clade of the Dalbergieae.

[2][3] It is the only member of the genus Fissicalyx.